Ni-Co bimetallic decorated dodecahedral ZIF as an efficient catalyst for photoelectrochemical degradation of sulfamethoxazole coupled with hydrogen production.

Autor: Thamilselvan A; Institute of Analytical and Environmental Sciences, National Tsing Hua University, Hsinchu 30013, Taiwan., Dang VD; Faculty of Biology and Environment, Ho Chi Minh City University of Food Industry, 140 Le Trong Tan, Tan Phu dist., Ho Chi Minh 700000, Viet Nam., Doong RA; Institute of Analytical and Environmental Sciences, National Tsing Hua University, Hsinchu 30013, Taiwan. Electronic address: radoong@mx.nthu.edu.tw.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2023 May 15; Vol. 873, pp. 162208. Date of Electronic Publication: 2023 Feb 19.
DOI: 10.1016/j.scitotenv.2023.162208
Abstrakt: In this work, a NiCo bimetallic ZIF (BMZIF) dodecahedron material has been synthesized by the precipitation approach and then used for simultaneously photoelectrocatalytic degradation of sulfamethoxazole (SMX) and hydrogen production. The combination of Ni/Co loading in ZIF structure increased the specific surface area 1484 (m 2  g -1 ) and photocurrent density (0.4 mA cm -2 ), which can facilitate the good charge transfer efficiency. In presence of peroxymonosulfate (PMS, 0.1 mM), the complete degradation of SMX (10 mg L -1 ) was achieved at initial pH of 7 within 24 min, with the pseudo-first-order rate constants of 0.18 min -1 and TOC removal efficiency of 85 %. Radical scavenger experiments affirm that • OH radicals were the primary oxygen reactive species to drive the SMX degradation. Along with SMX degradation at the anode, the H 2 production was observed at the cathode (140 μmol cm -2  h -1 ), which was 1.5 and 3 times higher than that of Co-ZIF and Ni-ZIF, respectively. The superior catalytic performance of BMZIF was assigned to the distinctive internal structure and synergistic effect between ZIF and Ni/Co bimetals, which improves light absorption and charge conduction efficiency. This study may provide insight into the new way to treat polluted water and simultaneously produce green energy using bimetallic ZIF in a PEC system.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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